Lathe



(No Model.) 3'Sheets-Sheet 1.

O. H. BAUSH. LATHE.

Patented Sept. 2-0, 1892.,

(No Model.) 3 Sheets-Sheet 2. I

' C. H. BAUSH.

LATHE.

No. 482,991. Patented Sept. 20, 1892.

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(No Model) 1 3 SheetsSheet 3. G. H. BAUSH.

LATHE.

No. 482,991. Patented Sept. 20, 1892.

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CHRISTIAN II. BAUSH, OF HOLYOKE, MASSACHUSETTS.

LATHE.

SPECIFICATION forming part of Letters Patent No. 482,991, datedSeptember 20, 1892.

Application filed February 5, 1892. Serial No. 420.410. (No model.)

To all whom it may concern.-

Be it known that I, CHRISTIAN H. BAUsH, a citizen of the United States,residing at Holyoke, in the county of Hampden and State ofMassachusetts, have invented new and useful Improvements in Lathes, ofwhich the followlng is a specification.

This invention has especial reference to improvements in the driving andreversing mechanism for the feed-screw shaft which actuates the slide ortool carriage for lathes, whereby by the provision and operation of thenovel and comparatively simple and readily-controlled appliances betweenor relative to the driving-spindle and the feed-screw shaft the lattermay have the forward or reversed rotation, as desired.

The invention to this end consists in the combination, with the drivingspindle or shaft, of another rotatable element and a feed-screw shaftgeared thereto, a pair of gear-wheels, each loose on said rotatableelement, and means for effecting the engagement of either of said gearswith said element, and gearing between the driving-spindle and one ofsaid pair of gears for driving the rotatable element in one direction,and other gearing between the driving-spindle and the other one of saidpair of gears for reversely driving the rotatable element.

The invention may be otherwise stated as consisting in constructions andcombinations of parts, all substantially as will hereinafter more fullyappear, and be set forth in the claims.

In the accompanying drawings the invention is fully and clearlyillustrated.

Figure 1 is partly a vertical sectional view lengthwise of a lathe withthe improved mechanism applied thereto, some of the parts, however,being shown in side elevation. Fig. 2 is an end elevation. Fig. 3 is avertical section on line 3 3, Fig. 1. Fig. 4 is a perspective view ofthe novel reversing mechanism, shown as removed from the ordinary lathestructure. Fig. 5 is a face View and crosssection in detail of one of apair of gearwheels and the rotatable element on which it may have anengagement or on whichit may rotate freely. Fig. 6 is an inner face viewof the other of the pair of gear-Wheels which is adapted to be engagedwith or rendered loose on the rotatable supporting element therefor.

In the drawings, A represents the bed of the.

lathe, of which B is the head-stock, the spindle or driving-shaft 0having the usual cone-pulleys D.

E is the carriage for the side or tool rest, which latter is indicatedat F, the same being longitudinally movable along the bed, and, as usualin lathes, is engaged by the longitudinally-extended feed-screw shaft G.

The means to which this invention particularly relates for effecting, asdesired, from the running of the spindle O in a given direction either aforward or reversed feeding rotation of the feed-screw shaft andconsequent forward or reversed movement of the side rest or carriageengaged by the feed shaft will be now described in detail. J in dicatesa rotatable element, here shown as a sleeve mounted in suitable bearingsof the head-stock with its axis parallel with the spindle andscrew-shaft, and has fixed on its end a gear-wheel a, which is geared tothe gear-wheel b on the extremityof the feed-screw through theintermediate gear d. f and g indicate two gearswheels side by side onthe said rotatable element J, with one of which f-the gear h on thedriving-spindle O is geared through the intermediate gear-wheel t, whichis in mesh with both the said gear-wheels h and f. The gear-wheel h onthe spindle is otherwise geared to the other loose gear g that is tosay, through the train constituted by the gear-wheel 6 which is mountedto move as one with the gear '5, and the additional idler-gear k in meshwith both gears t and g. It is manifest that the spindle O and gear h,having a rotation in one direction, will insure the rotation of thegear-wheel f in the same direction and the rotation of the gear-wheel g,owing to the additional idler in the train, in the reverse direction,and to insure the r0- tation of the feed-screw shaft for the forward orreversed feed it is only necessary to effect the engagementof the one orthe other of the gears f and g with the sleeve J. The inner adjacentfaces of the gear-wheels f and g are chambered and provided with anengagement member or abutment m, while at indicates a dog which isformed as a radially-projecting IOC member of a collar 72 which ismounted for a sliding movement on the part J. The sliding movement isimparted to the collar by the endwise movement of the rod 0, which playslongitudinally within the sleeve and has at its inner extremity across-pin 0 the outwardly-projectiug extremities of which projectthrough the longitudinal slots 0 through the sides of the sleeve andhave an engagement with said dog-provided collar. On forcing the rod 0outwardly the gear f only will be in engagementwith the sleeve J and thefeedscrew shaft will rotate with the spindle C, or forcing the rod 0inwardly the gear-wheel 9 only will be in engagement with the sleevewhen the feed-screw shaft will have a rotation the reverse of that ofthe spindle.

Devices for effecting the longitudinal movement of the rod 0 which maybe employed consist as follows: (1 represents a splined rockshaftmounted in bearings at the front of the lathe-bed, on which is thespline-engaging handle-lever p and also the crank-arm r. s is a verticalrock-shaft having at its upper end the arm t, which engages theextremity of the said rod 0, and having at its lower end a crank-arm u,with which one end of the link 0 is pivotally connected, the other endof the link being pivoted to the crank-arm r. The hub of thehandle-leverp is notched, with which engages a spring-detent w formaintaining the rock-shaft in any given adjusted position, readilypermitting, however, the shifting movements of the parts of theapplication of suflicient positive pressure upon the handle-lever.

In Fig. 1 there is shown a casing :11; for certain of the gears at theend of the head-stock, which casing is, however, omitted from Fig. 2 forthe purposes of clearer illustration.

An advantage inuring to thisinvention, in addition to the simplicity andefficiency of the reversing mechanism, resides in the arrangement of thenovel gearing and coacting parts, whereby they are readily accessiblefor lubrication or other purpose.

' Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. In a lathe, in combination, the drivingspindle, a shaft, and thefeed-screw geared to the latter, a pair of gear-wheels each loose onsaid shaft, and means for elfecting the engagement of either of saidgears with said shaft, and gearing between the driving-spindle and oneof the said pair of gears for driving said shaft in one direction, andother gearing between the driving-spindle and the other of said pair ofgears for reversely driving the shaft, substantially as described.

2. In a lathe, in combination, the driving shaft or spindle, the sleevemounted for rotaand a feed-screw shaft geared to the sleeve, a pair ofgear- Wheels each loosely mounted on the sleeve and each having anabutment member gearing between the driving-spindle and saidsleeve-supported gears for driving the latter in opposite directions, acollar adapted to slide along the sleeve and having a dog to engage theabntmenhpiece of either of said pair of gears, and a rod movable endwisewithin the sleeve and having a pin projecting through a slot which isformed through the sleeve and engaging said slidecollar, substantiallyas and for the purposes set forth.

3..In a lathe, in combination, the driving shaft or spindle having thegear h thereon, the rotatable sleeve having a slot 0 and the gear a, andthe feed-screw shaft G, having the gear I), and the intermediate gear d,connecting said gears a and b, the gears f and 9, normally loose on thesleeve and each having an abutment-piece, as m, the dog-carryingslidecollar, and the rod 0, having the pin 0 pro jeoted through thesleeve-slot, engaging the collar, the gear i, in engagementwith saidgears h and f, and the gear 11 mounted to rotate as one with said gear11 and having the gear between it and the gear g, and means forimparting endwise movements to said rod 0, substantially as described.

4. In a lathe, the di'ivingspindle, the sleeve mounted for rotation, anda feed-screw shaft geared to the sleeve, a pair of gear-wheels looselymounted on the sleeve and each having an abutment member, sets ofgearing between the drivingrspindle and said sleeve-supported gears fordriving the latter, respectively, in opposite directions, thedog-carrying collar movable along the sleeve,.and a rod movable endwisewithin the sleeve and having a pin projecting through a slot which isformed through the sleeve to engage the slide-collar, combined with therock-shafts q and s, the latter having the arm t, engaging the rod 0,and the crank-arm u, and said rock-shaft (1 having a handle-lever andthe crank-arm 'r, and the link between said arms r and a, substantiallyas set forth.

CHRISTIAN H. BAUSI-I.

